Install Instructions
8
Residential Whole House Indoor Air Quality
FORM NO. 300-8105 REV_A DH75 DH100 INSTALLATION OWNERS MANUAL
JPF REV 5-24-2018
Typical System Operation Sequence
When the relative humidity exceeds the dehumidistat set point, the dehumidistat will energize the dehumidication and
air circulation components of the DH75 / DH100 (note the time delay on some electronic dehumidistats). If the DH75 /
DH100 system is connected and interlocked with an existing heating/air conditioning system, the system circulation fan
will also be energized. The DH75 / DH100 will continue to operate until the humidity level is reduced to the set point
selected on the dehumidistat and then will cycle off. During this cycle, the air circulated through the DH75 / DH100
system will be ltered and dehumidied.
Coil Freeze Protection (Auto Defrost)
The dehumidication coil (evaporator) is equipped with a low temperature freeze thermostat. If the coil temperature is
reduced to the point of ice buildup, the thermostat will open the compressor control circuit while allowing the fan to
continuing running. Once the coil has returned to normal conditions, the control will close and allow the compressor to
re-start. The prevailing conditions of the return air (temperature and humidity) will determine the length of this cycle.
Compressor Protection
The dehumidier control module is equipped with a delay timer function to prevent compressor short cycling and
enhance product performance. The control module delay timer (approximately 5 minutes) allows for adequate off time to
ensure the pressures equalize before the next start.
Maintenance
High Efficiency Air Filter - Replace Every 6 Months
The DH75 / DH100 includes a MERV 11 pleated lter that captures as much as 80% of particles 1.0 to 3.0 microns in
size. The lter's function is to keep your dehumidier running clean and efcient (whether incorporated into your HVAC
system or installed as a stand alone unit). The MERV 11 air lter is NOT designed to replace your current whole house air
cleaner/lter installed within your HVAC system.
Operating the unit with a dirty lter will reduce dehumidier capacity and efciency, may cause the compressor to cycle
off and on unnecessarily, and may clog the heat exchange coils. Under normal operating conditions, the lter will last
approximately 3 to 6 months. However, in high particulate concentrations more frequent replacements may be required.
It is recommended that the lter be inspected regularly for the rst three to four months to determine the loading and
correct replacement intervals. Your installation contractor should be contacted for assistance. Replace your filter
every 6 months, or as often as required to keep the unit clean and maintain your warranty.
To access the air lter, remove the lter access panel from the front or back side of the unit, marked “Filter Access”. The
lter should be readily visible and can be removed by pulling it straight out of the unit. Ensure arrows indicating air ow
direction are pointed towards the unit. Replacement lters can be purchased from your installing contractor or ordered
from the factory if a local wholesaler is not available.
CAUTION: DO NOT operate the unit without the lter, or with a less effective lter than originally supplied.
FAILURE TO MAINTAIN SERVICE AND UTILIZE CLEAN FILTERS WILL VOID WARRANTY.
Oiling & Lubrication
The fan motor is factory lubricated and sealed, and no further oiling is required. There are no other components
requiring the addition of lubricants.
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GENERAL FILTERS
INCORPORATED